Well boring apparatus



Feb. 11, 1936. A. PRANGE ETAL WELL BORING APPARATUS File June 1, 1951 2 sheets-sheet 1 IN VEN TORS ber Pra/yer.' Burwe//qy/rin, Jr:

` Feb. l1., 1936. A. PRANGER ETAL l 2,030,318l

WELL BORINQAPPARATUS Fiied June 1, 1931 I k 2 sheets-sneu 2 BY l v ATTORNEY vreunited Feb. 1.1', 1936,

PATENT' OFFICE r WELL, BORING APPARATUS Albert Pranger and Burwell Boykin, Jr., Beaumont, Tex., assignors, by mesne assignments, to International-Stacey Corporation, Columbus, Ohio, a corporation of hio Application June 1, 1931, Serial No. 541,406

3 Claims.

Our invention relates to well boring apparatus and has to do particularly with rotary well bor` ing apparatus generally referred to as make-andbre'ak rotaries. It hasto do especially with the prov`sion of a novel structure for effecting adequate lubrication of make-and-break rotaries.

In the past, make-and-break rotaries have suffered from inadequate lubrication of the parts thereof. This has probably been due to the fact that the structure necessary for performance of the various operations involved in the use of the make-and-break structure have been of such a nature as to'render diicult the adequate lubrication of the parts without undesirable complcation of' structure.

One of the objects of our invention is to provide a make-and-break rotary `of a simple construction which is, nevertheless, provided with an adequate lubricating mechanism to ensure-that removable parts thereof will be given a maximum longevity.

Another object of our invention is to provide a lubricating system wherein all necessary lubrication will be effected while, at the same time,

adequate provision will be made to prevent dust or other extraneous and undesirable substances from coming in contact with the lubricated parts of the machine.

In its preferred form, our invention preferably 'contemplates Ythe provision ofA a lubricating means in the form of an oil-bath so related to the movable parts-as to ensure that these movable parts will be adequately and effectively supplied with lubricant by the splash system. In this form, a rotating pinion is utilized for splashing the lubricant over the different parts to be lubricated.

A housing is provided with `a covering flange.

Furthermore, there is also provided a V-shaped' skirt which will `lead any foreign substance to a trough which will, in turn, conduct said foreign substance to the exterior of the apparatus.

The preferred embodiment of ourfinvention is shown in thefaccomp'anying drawings wherein.

similar characters of reference designate corresponding parts and wherein: l

Figure 1 is a plan' view of a male-and-break rotary equipped with our lubricating system.

Figure 4 is a view lsomewhat similar to Figure Q- 3,l with the pipe in position in the apparatus and (Cl. Z55-23') with the parts in position for the making up or unscrewing operation.

Figure 5 is a perspective View, partially broken away, and showing they pipe in position.

In the drawings, we have shown a base or supporting ring I vwhich is mounted or cast as an integral part of a rotary bed 2.- This base or supporting ring I has, slidably mounted on the upper surface thereof, locking members 3 and4 which operate in uideways of conventional form. These locking m mbers 3 and 4 are each provided with integral extensions 5 and 5 having rack teeth 1 and 8 which mesh with segmental gears 9 and I0 that may be operated in any suitable manner to move these locking members toward 'and from eachother into and out of locking position.

These locking members 3 and 4 comprise semicircular channels II and I2 having teeth I3 and I 4 therein for the reception of the teeth I5 on the base of the spider I6. As illustrated in Figure 4,

these locking members serve, when in operative position, to support the spider I6 in elevated pos',- ticn and to preclude rotation thereof during the making up or unscrewing operation so as to pre- .clude rotation of a lower pipe section through the medium of a wrench to be held immovable with relation thereto, as will be subsequently described.

The spider I6` is provided adjacent its upper end with a laterally extending flange I'I of annular form, the under surface of this flange being provided with teeth I8. This laterally extending ange I1 overlies an annular shoulder I 9 which is integrally formed upon a table 20 and which is provided witha plurality of teeth 2l (see Figure 4) which are designed for cooperation 3,

with the teeth I8 of the flange I'I when the spider is lowered, as during the boring operation.

'I'he lower portion of the tabl-c 20 is provided -with an annular groove 22 within which ts the upper half 23 of a ball racev or runway which is designed to cooperate with the lower half 24 of the ball race or runway to retain antifriction members such as the balls-25. The lower half 24 of the runway is'carried in an annular groove 26 which forms 'an integral part of a trough structure 21.

The table isvprovided adjacent its periphery and upon anl under surface thereof with a beveled annular rack or gear 28. This beveled annular rack or gear 28 is designed to be driven .by a bevel pinion 29 carried upon a shaft 30 which is mounted in an anti-friction bearing 3l. This shaft 30 is journaled, at its extremity, 'in a. bearing 32 and is-provided intermediate its length withja sprocket 33 which. may be driven CTI by a sprocket chain from any suitable source of power.

The rotary table 20 carries a radially slidable pin 34 which is movable into and out of the position shown in Figure 3. In this position, it projects over an annular shoulder 3S ywhich is integrally formed on the ange l1 of the spider l5 and, in this position, it is effective to hold the spider in its lowest position with the teeth I8 and 2l in interlocked relation, so that the spider must rotate with the table. In this position, the pin 34 may be oscillated 'so that its nger 31 rests between lugs 38 and prevents accidental withdrawal of the pin.

When it is desired to raise the spider I6, the pin Sli is oscillated to relieve it from restraint by the lugs 3S and it is then moved to the position shown in Figure 4 so that the vannular shoulder 3S is no longer restrained and the spider i6 is free to move upwardly. In this withdrawn position, the pin 313 may again be oscillated so that its iinger @l will lie behind the outmost lug 323 which will prevent accidental inward movement.

'I'he spider it carries upon ,its interior the master bushing 39 and within this is disposed the grief stem bushing 453. These parts may be locked in position by means of a radially slidable pin il which is carried by the spider and which may be projected into the socket l2 in the grief stem bushing. This pin 4l also carries a nger 43 which cooperates with spaced lugs 44 in a manner similar to-.the cooperation of the finger 31 of the pin 34 with the spacedlugs 38.

The spider i6 is provided upon its upper surface with a socket 45 which is designed to receive a vertical bar as shown at 46 in Figure 4. Likewise, the table 20 isfprovided upon its upper surface with a socket t1 which is designed to receive a vertical bar 48, the vertical bar being held therein by a bushing 49 and extending a substantial distance above the vertical bar 46.

The operation ofmaking up or unscrewing/ the in the wrench A is clamped upon a lower section of the pipe and is restrained from rotary movement so as to prevent rotation of this lower section of the pipe while the wrench B is clamped upon the upper section of the pipe and is moved in a rotary path by pressure from the upstanding vertical bar 43 as the table 20 is caused to rotate under the driving action ofthe pinion i9.`

The trough 21 forms a part of an oilfbath structure which further comprises the bearing housing 50 having the flange 5I cast thereon. It likewise comprises a guard 52 which mainly surrounds the remainder of the operating parts of the apparatus and which is provided at its upper edge with a corrugated flange 53 extending inwardly over the top of the table.

It will be apparent from this that this structure forms a complete housing for the working need lubrication.

'an annular trough entirely within said housing As a protection against the entrance of foreign matter into the enclosed oil chamber, the table 2l! is provided with a V-shaped skirt 54 which overhangs an annular trough 55 carried upon the inner wall of the guard or housing 52. A number of holes 5E communicate with the base of the trough 55 and any foreign matter which enters the housing will find its way to the outside through these holes 56.

It will be seen from this structure that we have 10 provided a simple and compact make-and-break rotary which is provided with an oil bath of such a structure that all of the moving parts thereof will be given adequate lubrication. Furthermore, this is accomplished in such a manner that 15 it is not necessary to detract from the efficiency of the make-and-break rotaries by modification thereof in order to accommodate the lubricating system. It will furthermore be evident that the apparatus is of such a nature that foreign matter 30 is practically excluded from the working parts while any such foreign matter as may accidentally enter beneath the flange 53 of the guard 52 is automatically conducted to the exterior of the apparatus. 25

Having thus described our invention, what we claim is:

1. A make-and-break rotary comprising a ro- I tatable table, a spider, means for driving said rotatable table, an oil bath housing partially en- .".o closing said rotatable table and projecting partially across the top thereof, a skirt on said rotatable table, and an annular troughv entirely within said housing and so disposed as to cooperate with said skirt for conducting foreign matter thereinto, said annular trough having ports leading therefrom. A

2. A make-and-break rotary comprising a rotatable table, a spider, means for driving said rotatable table, an' oil bath housing partially 40 enclosing said rotatable table and projecting partially across the top thereof but terminating at such a position-as to permit raising or lowering of said spider, a skirt on said rotatable table, and

and so disposed as to cooperate with said skirt for conducting foreign matter into said'trough, said annular trough having ports leading therefrom to the exterior or" said housing.

3. A make-and-break rotary comprising a ro- 5o tatable table, a spider, means for driving said rotatable table, an oil bath housing partially enclosing said rotatable table and projecting par- 

